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प्रश्न
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that ______.
विकल्प
The allels of two genes are segregating independently
It is a case of multiple allelism
It is a multigenic inheritance
The allels of two genes are interacting with each other
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उत्तर
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that the allels of two genes are segregating independently.
Explanation:
The 9:3:3:1 ratio observed in a dihybrid cross denotes that the alleles of two different genes are assorting independently of each other during gamete formation. This classic Mendelian dihybrid ratio demonstrates the law of independent assortment, which states that gene pairs located on different chromosomes segregate independently during meiosis, resulting in this phenotypic ratio in the F2 generation. Thus, each trait is inherited independently, producing four distinct phenotype classes in the ratio of 9 (both dominant traits) : 3 (dominant first, recessive second) : 3 (recessive first, dominant second) : 1 (both recessive).
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संबंधित प्रश्न
What is a dihybrid cross? How did Mendel perform this cross?
A homozygous Tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf plant (t) bearing white flowers (r):
(1) Give the Genotype and Phenotype of the F2 generation.
(2) Give the possible combinations of the gametes that can be obtained from the F2 hybrid.
(3) Give the dihybrid ratio and the phenotype of the offsprings of the F2 generation when two plants of the F1 generation above are crossed.
Complete the following sentence with appropriate word:
_______ is the ratio of dihybrid cross.
In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seed pant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in the F1 generation?
The genotype of a plant showing the dominant phenotype can be determined by
Select the correct statement from the ones given below with respect to dihydrid cross
Select the period for Mendel’s hybridization experiments
Among the following characters which one was not considered by Mendel in his experimentation pea?
Name the seven contrasting traits of Mendel.
What are the reasons for Mendel’s successes in his breeding experiment?
Explain the law of dominance in a monohybrid cross.
Identify the statementls that is/are NOT the correct reason/s for Mendel's success in his hybridization experiments.
i. Each factor controlled the single trait and is located on separate chromosomes.
ii. In the pea plant, contrasting characters can be easily recognized.
iii. Mendel carefully recorded the number of plants of each type and expressed his results as ratios.
iv. Mendel performed biochemical assays for identifying the position of 'factors' on chromosome.
A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
A dihybrid condition is ______.
In a dihybrid cross AABB x aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of ______.
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?
Each gamete carry ______.
According to the evolutionary theory, formation of a new species is generally due to
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
What will be set of genes present in the F1 generation?
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
Give a reason why only tall plants are observed in F1 progeny.
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
When F1 plants were cross-pollinated with plants having tt genes, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F2 generation.
Which one of the following genetic ratios will be obtained in a dihybrid test cross:
Which of the following statement is not correct for two genes that show 50% recombination frequency?
Independent assortment means:
